* gcc.target/i386/i386.exp (check_effective_target_ssse3): New.
	(check_effective_target_sse4a): Ditto.

	* gcc.target/i386/ssse3-phsubw.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-phaddd.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-pabsb.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-psignb.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-phaddsw.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-pabsd.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-psignd.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-pmaddubsw.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-pmulhrsw.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-phaddw.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-phsubd.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-pabsw.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-psignw.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-pshufb.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-phsubsw.c: Require effective target ssse3.
	* gcc.target/i386/ssse3-palignr.c: Require effective target ssse3.
	* gcc.target/i386/sse4a-insert.c: Require effective target sse4a.
	* gcc.target/i386/sse4a-extract.c: Require effective target sse4a.
	* gcc.target/i386/sse4a-montss.c: Require effective target sse4a.
	* gcc.target/i386/sse4a-montsd.c: Require effective target sse4a.

From-SVN: r124939